Dump-car.



No. 780,760. I PATENTED JAIL 24,1905

' s. OTIS.

DUMP GAR.

APPLICATION FILED JUNE 18, 1903.

UNITED STATES Patented January 24, 190 5.

SPENCER OTIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO NATIONAL. COAL DUMP CAR COMPANY, OF RAPID CITY,

RATION or SOUTH DAKOTA.

SOUTH DAKOTA, A CORPO- DUMP-CAR.

SPECIFICATION forming part of Letters Patent N0. 780,760, dated J ailuary 24;, 1905.

' Application filed June 18, 1903. Serial No. 162,003.

To aZZ whom, it may concern;

Be it known that I, SPENCER OTIS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Dump-Cars, of which the'following is a specification.

My invention relates to that class of cars known as clrop bottom dump-cars, and has for its principal object the providing ,of a drop-bottom dump-car with means for adjusting the door-closing chain mechanism.

Other objects of the invention will appear from an examination of the drawings and the following description and claims.

The invention consists in the features, combinations, and details of construction hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a sectional elevation taken transversely across a dump-car, showing a portion of one side thereof as it appears when constructed in accordance with these improvements; Fig. 2, a perspective view of the under side of one end of a swinging section forming apart of the drop-bottom of the car, and Fig. 3, a perspective view of one of the adjusting chainhooks.

In illustrating and describing these improvements I have only illustrated and .described that which I consider to be new, taken in connection with so much as is old as will properly disclose the invention to others and enable those skilled in the art to practice the same, leaving out of consideration other and well-known mechanisms which if set forth herein would only tend-to confusion, proliX- ity, and ambiguity.

In constructing, a car. in accordance with these improvements I provide a supportingframework containing center'sills a and transverse deck-beam's b, tied together in any desired manner. Secured to the supportingframeworkso as to provide a flat drop-bottom and at each side of the longitudinal center thereof is a plurality of swinging sections a, with their inner edges containing the hingepivots d. Side-boardsc and end-boards e are provided, which may be secured in any desired manner; but I prefer to secure them, by means of strapsf and posts g, to the underframing or supporting-framework of the car.

In this type of car it is well .known that the chain mechanism by which the swinging sections of the drop-bottom are raised and lowered are oftentimes stretched during use. Again, as a plurality of chains are used, one for each door, in the first instance they do not allow the closing of the doors on account of the variations in the lengths thereof. It becomes desirable, therefore, and indeed necessary, to provide some means by which the variations in the original length of these chains or caused from the use thereof may be taken up at any desired time or times. To accomplish this, a rockshaft 71, is provided, around which is wound a plurality of chains 2', one for each door. The lower outer edge of each door is provided with an angle-iron or metal bar ,7', having a plurality of grooves k, in, and 70 in the lower edge of the depending portion. Each chain is provided with a hook portion Z, secured to the lower end thereof, which hook may be pivoted to the angle-iron by means of a rivet or boltpassed through the perforation Z in the hook or in one of the perforations j in the angle-iron. In use the pivot of the hook is pressed through the perforation j opposite the deepest groove 70 when the chain is new or first in use,.the upper part of the hook passing through the slot 0 in the door.

Should the chain for any reason stretch, the

pivot-bolt of the hook may be removed and to be wound therearoundone for each swinging section, a metallic bar attached to each swinging section provided with a plurality of grooves of different depths, and a hook secured to each chain and adapted to be pivotally secured to the metal bar and engage any groove therein, and to each chain, substantially as described.

2. In a drop-bottom dump-car, the combination of a supporting-framework provided with upwardly-extending side and end boards, a drop-bottom portion formed of a plurality of swinging sections pivotally secured to the framework of the car at each side of the longitudinal center with their free edges extending out toward the sides of the car, a rockshaft in each side frame of the car provided Witnesses:

THOMAS FRANCIS SHERIDAN, HARRY IRWIN CRoMnR. 

